cnn's reza sayah is reporting from cairo. >> reporter: dana, the demonstrations here in egypt are starting to spread to places outside of cairo. according to the interior ministry. protesters tried to attack the offices of the muslim brotherhood in the northern city. that's when muslim brotherhood supporters fought back. a number of injuries and arrests there, but the heart of the protests are still here in tahrir square. i'm going to step aside to give you a live look at what tahrir square looks like right now. a few thousand people here. they say they're determined to stay here until mr. morsi rescinds his controversial decrees. those are the peaceful protesters, and the arteries leading m tahrir. we've had some clashes. they seem to be teenagers, young men. it's hard to say if they're out here fighting for democracy or they're out here looking for trouble. in the meantime, opposing factions to mr. morsi are mobilizing to add pressure on him. on saturday a judge's group calling for an all-out judges strike, and also a one million man protest against mr. morsi on tuesday, dana. >> thank y